best practices/steps for hive meta store backup and restore.

[Phani1]

Hi Team,

Could you share with us the best practices/steps for hive meta store backup and restore?

Regards,

Phanindra

[Anonymous]

@Janga Reddy​ :

Certainly! Here are the steps for Hive metastore backup and restore on Databricks:

Backup:

1. Stop all running Hive services and jobs on the Databricks cluster.
2. Create a backup directory in DBFS (Databricks File System) where the metadata files will be stored.
3. Run the following command to export the Hive metastore data to a JSON file in the DBFS backup directory:

%sql
EXPORT METASTORE TO 'dbfs:/backup/metastore.json';

Verify that the backup file has been created and is accessible in the DBFS backup directory.

Restart the Hive services and jobs.

Restore:

1. Stop all running Hive services and jobs on the Databricks cluster.
2. Ensure that the backup file is accessible in the DBFS backup directory.
3. Run the following command to import the Hive metastore data from the JSON file:

%sql
IMPORT METASTORE FROM 'dbfs:/backup/metastore.json';

Verify that the metastore has been restored successfully by checking the metadata information.

Restart the Hive services and jobs.

Note: It is recommended to test the backup and restore process in a non-production environment before performing it on a production cluster. Also, ensure that you have the necessary permissions to access and modify the metastore files and directories.